/*
 * usbfs header structures
 * Copyright © 2007 Daniel Drake <dsd@gentoo.org>
 * Copyright © 2001 Johannes Erdfelt <johannes@erdfelt.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef LIBUSB_USBFS_H
#define LIBUSB_USBFS_H

#include <linux/magic.h>
#include <linux/types.h>
#include "Log.h"
#include "libusbi.h"
#define SYSFS_MOUNT_PATH "/sys"
#define SYSFS_DEVICE_PATH SYSFS_MOUNT_PATH "/bus/usb/devices"

struct usbfs_ctrltransfer {
    /* keep in sync with usbdevice_fs.h:usbdevfs_ctrltransfer */
    __u8 bmRequestType;
    __u8 bRequest;
    __u16 wValue;
    __u16 wIndex;
    __u16 wLength;
    __u32 timeout; /* in milliseconds */

    /* pointer to data */
    void *data;
};

struct usbfs_setinterface {
    /* keep in sync with usbdevice_fs.h:usbdevfs_setinterface */
    unsigned int interface;
    unsigned int altsetting;
};

#define USBFS_MAXDRIVERNAME 255

struct usbfs_getdriver {
    unsigned int interface;
    char driver[USBFS_MAXDRIVERNAME + 1];
};

#define USBFS_URB_SHORT_NOT_OK 0x01
#define USBFS_URB_ISO_ASAP 0x02
#define USBFS_URB_BULK_CONTINUATION 0x04
#define USBFS_URB_QUEUE_BULK 0x10
#define USBFS_URB_ZERO_PACKET 0x40

#define USBFS_URB_TYPE_ISO 0
#define USBFS_URB_TYPE_INTERRUPT 1
#define USBFS_URB_TYPE_CONTROL 2
#define USBFS_URB_TYPE_BULK 3

struct usbfs_iso_packet_desc {
    unsigned int length;
    unsigned int actual_length;
    unsigned int status;
};

#define MAX_BULK_BUFFER_LENGTH 16384
#define MAX_CTRL_BUFFER_LENGTH 4096

#define MAX_ISO_PACKETS_PER_URB 128

struct usbfs_urb {
    unsigned char type;
    unsigned char endpoint;
    int status;
    unsigned int flags;
    void *buffer;
    int buffer_length;
    int actual_length;
    int start_frame;
    union {
        int number_of_packets;  /* Only used for isoc urbs */
        unsigned int stream_id; /* Only used with bulk streams */
    };
    int error_count;
    unsigned int signr;
    void *usercontext;
    struct usbfs_iso_packet_desc iso_frame_desc[0];
};

struct usbfs_connectinfo {
    unsigned int devnum;
    unsigned char slow;
};

struct usbfs_ioctl {
    int ifno;       /* interface 0..N ; negative numbers reserved */
    int ioctl_code; /* MUST encode size + direction of data so the
                     * macros in <asm/ioctl.h> give correct values */
    void *data;     /* param buffer (in, or out) */
};

#define USBFS_CAP_ZERO_PACKET 0x01
#define USBFS_CAP_BULK_CONTINUATION 0x02
#define USBFS_CAP_NO_PACKET_SIZE_LIM 0x04
#define USBFS_CAP_BULK_SCATTER_GATHER 0x08
#define USBFS_CAP_REAP_AFTER_DISCONNECT 0x10

#define USBFS_DISCONNECT_CLAIM_IF_DRIVER 0x01
#define USBFS_DISCONNECT_CLAIM_EXCEPT_DRIVER 0x02

struct usbfs_disconnect_claim {
    unsigned int interface;
    unsigned int flags;
    char driver[USBFS_MAXDRIVERNAME + 1];
};

struct usbfs_streams {
    unsigned int num_streams; /* Not used by USBDEVFS_FREE_STREAMS */
    unsigned int num_eps;
    unsigned char eps[0];
};

#define USBFS_SPEED_UNKNOWN 0
#define USBFS_SPEED_LOW 1
#define USBFS_SPEED_FULL 2
#define USBFS_SPEED_HIGH 3
#define USBFS_SPEED_WIRELESS 4
#define USBFS_SPEED_SUPER 5
#define USBFS_SPEED_SUPER_PLUS 6

#define IOCTL_USBFS_CONTROL _IOWR('U', 0, struct usbfs_ctrltransfer)
#define IOCTL_USBFS_SETINTERFACE _IOR('U', 4, struct usbfs_setinterface)
#define IOCTL_USBFS_SETCONFIGURATION _IOR('U', 5, unsigned int)
#define IOCTL_USBFS_GETDRIVER _IOW('U', 8, struct usbfs_getdriver)
#define IOCTL_USBFS_SUBMITURB _IOR('U', 10, struct usbfs_urb)
#define IOCTL_USBFS_DISCARDURB _IO('U', 11)
#define IOCTL_USBFS_REAPURBNDELAY _IOW('U', 13, void *)
#define IOCTL_USBFS_CLAIMINTERFACE _IOR('U', 15, unsigned int)
#define IOCTL_USBFS_RELEASEINTERFACE _IOR('U', 16, unsigned int)
#define IOCTL_USBFS_CONNECTINFO _IOW('U', 17, struct usbfs_connectinfo)
#define IOCTL_USBFS_IOCTL _IOWR('U', 18, struct usbfs_ioctl)
#define IOCTL_USBFS_RESET _IO('U', 20)
#define IOCTL_USBFS_CLEAR_HALT _IOR('U', 21, unsigned int)
#define IOCTL_USBFS_DISCONNECT _IO('U', 22)
#define IOCTL_USBFS_CONNECT _IO('U', 23)
#define IOCTL_USBFS_GET_CAPABILITIES _IOR('U', 26, __u32)
#define IOCTL_USBFS_DISCONNECT_CLAIM _IOR('U', 27, struct usbfs_disconnect_claim)
#define IOCTL_USBFS_ALLOC_STREAMS _IOR('U', 28, struct usbfs_streams)
#define IOCTL_USBFS_FREE_STREAMS _IOR('U', 29, struct usbfs_streams)
#define IOCTL_USBFS_DROP_PRIVILEGES _IOW('U', 30, __u32)
#define IOCTL_USBFS_GET_SPEED _IO('U', 31)

extern usbi_mutex_static_t linux_hotplug_lock;

#ifdef HAVE_LIBUDEV
int linux_udev_start_event_monitor(void);
int linux_udev_stop_event_monitor(void);
int linux_udev_scan_devices(struct libusb_context *ctx);
void linux_udev_hotplug_poll(void);
#else
int linux_netlink_start_event_monitor(void);
int linux_netlink_stop_event_monitor(void);
void linux_netlink_hotplug_poll(void);
#endif

static inline int linux_start_event_monitor(void) {
#if defined(HAVE_LIBUDEV)
    return linux_udev_start_event_monitor();
#elif defined(__OPENHARMONY__)
    return LIBUSB_SUCCESS;
#elif !defined(__ANDROID__)
    return linux_netlink_start_event_monitor();
#else
    return LIBUSB_SUCCESS;
#endif
}

static inline void linux_stop_event_monitor(void) {
#if defined(HAVE_LIBUDEV)
    linux_udev_stop_event_monitor();
#elif defined(__OPENHARMONY__)
    LOG_D("停止热插拔事件监听");
#elif !defined(__ANDROID__)
    linux_netlink_stop_event_monitor();
#endif
}

static inline void linux_hotplug_poll(void) {
#if defined(HAVE_LIBUDEV)
    linux_udev_hotplug_poll();
#elif defined(__OPENHARMONY__)
    LOG_D("热插拔事件轮训");
#elif !defined(__ANDROID__)
    linux_netlink_hotplug_poll();
#endif
}

void linux_hotplug_enumerate(uint8_t busnum, uint8_t devaddr, const char *sys_name);
void linux_device_disconnected(uint8_t busnum, uint8_t devaddr);

int linux_get_device_address(struct libusb_context *ctx, int detached, uint8_t *busnum, uint8_t *devaddr,
                             const char *dev_node, const char *sys_name, int fd);
int linux_enumerate_device(struct libusb_context *ctx, uint8_t busnum, uint8_t devaddr, const char *sysfs_dir);

#endif
